Wicks for oil burning appliance

Abstract

A wick for use in a burning appliance consisting of (A) a fuel absorbing section composed of a plurality of short fiber web layers forming its outermost layers and one or a plurality of long fiber layers of numerous long fibers aligned substantially in one direction and (B) a heat-resistant burning section adjacent to the fuel absorbing section. The long fiber layers and the short fiber web layers are physically united into an inseparable integral structure by, for example, needle-punching or stitch-bonding. The wick has a high rate of fuel absorption and permits burning of a fuel at a high caloric output.

What is claimed is: 
     
       1. A wick for use in a burning appliance consisting of (A) a fuel absorbing section having lower and upper ends, and (B) a heat-resistat burning section adjacent to said fuel absorbing section, wherein said fuel absorbing section is composed of one or a plurality of filament layers of numerous filaments aligned substantially in one direction and a plurality of web layers of randomly oriented staple fibers, said filaments not being substantially twisted and each of said filaments being continuous from the lower end to the upper end of the fuel absorbing section, said filament layers and web layers being alternately stacked so that the web layers from the outermost layers of the abosrbing section, and being physically united into an inseparable integral structure, and the fuel absorbing section having a fuel absorbing rate of at least 100 mm per 110 seconds. 
     
     
       2. The wick of claim 1 wherein the numerous filaments in the filament layers are selected from the group consisting of cellulose acetate fibers, polyamide fibers, acrylic fibers, polyester fibers, polyvinyl formal fibers, polyethylene fibers, polypropylene fibers, polyvinyl chloride fibers, wholly aromatic polyamide fibers, rayon, carbon fibers and glass fibers. 
     
     
       3. The wick of claim 1 wherein each web layer is composed of staple fibers selected from the group consisting of cellulose acetate fibers, polyamide fibers, acrylic fibers, polyester fibers, polyvinyl formal fibers, polyethylene fibers, polypropylene fibers, polyvinyl chloride fibers, wholly aromatic polyamide fibers, rayon, carbon fibers, glass fibers, cotton, flax and wool. 
     
     
       4. The wick of claim 1 wherein the filament layers and the web layers are physically united by needle punching. 
     
     
       5. The wick of claim 4 wherein the filament layers and web layers are needle-punched at a density of 50 to 400/cm 2  of its outermost surface on an average. 
     
     
       6. The wick of claim 1 wherein the filament layers and the web layers are physically united by stitch bonding. 
     
     
       7. The wick of claim 6 wherein the filament layers and the web layers are stitch-bonded with stitch yarns at a pitch of 1.5 to 5 mm and a density of 10 to 60 per 10 cm, said stitch yarns extending from the surface to the back of the stitch-bonded structure. 
     
     
       8. The wick of claim 1 wherein the heat-resistant burning section is composed of a woven fabric of a heat-resistant material. 
     
     
       9. The wick of claim 1 wherein the heat-resistant burning section is composed of a knitted fabric of a heat-resistant material. 
     
     
       10. The wick of claim 8 wherein the heat-resistant material is selected from the group consisting of glass fibers, carbon fibers and ceramic fibers. 
     
     
       11. The wick of claim 1 wherein each filament layer has a basis weight of 20 to 800 g/m 2 . 
     
     
       12. The wick of claim 1 wherein each web layer has a basis weight of 40 to 600 g/m 2 . 
     
     
       13. The wick of claim 1 wherein the weight ratio of the filament layers to the web layers is 1:0.2-2. 
     
     
       14. The wick of claim 1 which is in the form of a cylinder. 
     
     
       15. The wick of claim 1 which is in the form of a flat plate. 
     
     
       16. The wick of claim 1 wherein the fuel absorbing section consists of two of the web layers forming the outermost layers and one filament layer interposed therebetween. 
     
     
       17. The wick of claim 9 wherein the heat-resistant material is selected from the group consisting of glass fibers, carbon fibers and ceramic fibers. 
     
     
       18. The wick of claim 1 wherein the fuel absorbing section consists of two of the web layers forming the outermost layers, two of the filament layers respectively located inwardly of the web layers, and one web layer interposed between the two filament layers. 
     
     
       19. A wick for use in a burning appliance consisting of (A) a fuel absorbing section having lower and upper ends, and (B) a heat-resistant burning section adjacent to said fuel absorbing section, wherein said fuel absorbing section is composed of one or a plurality of filament layers of numerous filaments aligned substantially in one direction and a plurality of web layers of randomly oriented staple fibers, said filaments not be substantially twisted and each of said filaments being continuous from the lower end to the upper end of the fuel absorbing section, said filament layers and web layers being alternately stacked so that the web layers form the outermost layers of the absorbing section, and being physically united into an inseparable integral structure by needle punching, and the fuel absorbing section having a fuel absorbing rate of at least 100 mm per 110 seconds. 
     
     
       20. A wick for use in a burning appliance consisting of (A) a fuel abosrbing section having lower and upper ends, and (B) a heat-resistant burning section adjacent to said fuel absorbing section, wherein said fuel absorbing section is composed of one or a plurality of filament layers of numerous filaments aligned substantially in one direction and a plurality of web layers of randomly oriented staple fibers, said filaments not being substantially twisted and each of said filaments being continuous from the lower end to the upper end of the fuel absorbing section, said filament layers and web layers being alternately stacked so that the web layers form the outermost layers of the abosrbing section, and being physically united into an inseparable integral structure by stitch-bonding, and the fuel absorbing section having a fuel absorbing rate of at least 100 mm per 110 seconds.